TY  - RPRT
TI  - Letter Circular 291: Bureau of Standards publications on paint, varnish, and bituminous materials
PY  - 1930
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 291
DO  - 10.6028/NBS.LCIRC.291
ER  -